1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c856c9195889c169ea89f3af5b3b22874949add33b4b420652d71b3ddf6f8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f199c4d8-786c-4a66-b1cb-6a0f6b098cee.json and https://artists.proofprofile.net/proofs/artist/f199c4d8-786c-4a66-b1cb-6a0f6b098cee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe32873f8351c9b21cf8ed1950b61d3d861587a42216605131dab1e14ccf72e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ebaa6a05333123889cecd9e5c1f6923a6e8388241c69c7ef4a374afa2e69f5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902301.
Who Can I Turn To (When Nobody Needs Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17880893d6c70ad6c307238246ec41591d58f6d1da204b0ee4ecd6c9e6f7f196. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2fd3bf0f697d5f1963314c456978f86c0b000b70ff39afc9cc5b6f8b05902f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566af31cbb23f2c8f0d790da35fd5ee5b57e17f4a85d685d30101d4b76fe78fc. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ec3d9a8df55f0dc4295dad235c083f7144d5e946b2da30929bd295f6d4860. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9db526b53f480825266ea34bd455157f6d19f9c132ddb5afaac39aac522a551. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGZ20902306.